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Urban Poetics and Photography : Methodology and Selected Case Studies
Jun Tanaka 고려대학교 응용문화연구소 2008 에피스테메 Vol.- No.2
The paper discusses analyses of urban experience through the lens of photography. It posits that urban photography exhibits the mythological and poetic structure of the urban experience. The term “urban poetics” is used to elucidate this structure. The point of this paper's discussion is not to focus on the objective structure of the city, but rather, the personal and collective urban experience. For this purpose, as a means of directing our attention to urban representations, beginning with photography, the paper refers to what I have termed the “analysis of urban representations.” Thus, we will be guided by the goal of illuminating the poetic structure of urban experience through this analysis of urban representations. This analysis is not only a clue to the ways in which photographic works examine the mythological and poetic structure of urban experience. Through this discussion of architects and poets' relationship to the photographic medium, I have also sought to demonstrate the possibility of elucidating the “urban poetics” present in architecture and poetry. In my book, Urban Poetics, I also discuss architectural theory, painting, and film; however, I think photographic urban representation is a particularly powerful material in the analysis of mythological and poetic structure in urban experience. Ultimately, this is the reason I have chosen to focus on photographic representations of urban space in this paper.
Minimum Neutral Clamp Capacitor Design Considering Voltage Saturation for a Three-Level Inverter
Jun-ichi Itoh,Takaaki Tanaka 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
A neutral point clamped inverter has a voltage fluctuation problem at the neutral point capacitor. This paper discusses the minimum value of the neutral point capacitor considering the voltage command saturation with the voltage fluctuation suppression control method. This paper clearly demonstrates the stable relationships among the input voltage, the output voltage and the capacitance value. In addition, the minimization design procedure of the capacitance value basis on this analysis is demonstrated. The validity of the design method is confirmed by experimental results.
Jun Oyama,Tsuyoshi Higuchi,Takashi Abe,Keisuke Tanaka 대한전기학회 2006 Journal of Electrical Engineering & Technology Vol.1 No.1
We proposed a novel segment type switched reluctance motor (SRM) in which the segment core was embedded in aluminum (conductive metal) rotor block in order to increase the mechanical strength and easy manufacturing as well as to improve the performance characteristics and reduce the vibration and acoustic noise. This paper explains the operation principle and the drive system and shows the experimental results in comparison with the VR type SRM.
Best-Mix Generation Planning with Battery Energy Storage System Including Carbon-Neutral Requirement
Shimizukawa, Jun,Iba, Kenji,Hida, Yusuke,Yokoyama, Ryuichi,Tanaka, Kouji,Seki, Tomomichi The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1
Battery energy storage system (BESS) is attracting attention all over the world. BESS yields two types of benefits, i.e., economical benefit and environmental benefit. Economical benefit is yielded by reducing the cost of power plants that is composed by the operation cost and the construction cost. Recent serious concern against environment will be more important in the near future and it might be treated as penalty and/or constraints. The installation merit of BESS stands out when load factor of demand is low. If base generators composed of inexpensive and clean sources, and if peak generators composed of expensive and dirty sources, the benefit against operation cost becomes more remarkable. Besides, BESS can contribute to developing countries by reducing construction cost of generation plants. In this paper, the numerical analysis of this benefit is presented. The optimal amount of BESS is searched by evaluating CO2-reductions and cost benefits.
Yamanouchi, Jun,Oku, Takeo,Ohishi, Yuya,Fukaya, Misaki,Ueoka, Naoki,Tanaka, Hiroki,Suzuki, Atsushi Techno-Press 2018 Advances in materials research Vol.7 No.1
$TiO_2/CH_3NH_3Pb_{1-x}Sb_xI_{3-3x}Br_{3x}-based$ photovoltaic devices were fabricated by a spin-coating method using mixture solutions with $SbBr_3$. Effects of $SbBr3$, CsI or RbBr addition to $CH_3NH_3PbI_3$ precursor solutions on the photovoltaic properties where investigated. The short-circuit current densities and photoconversion efficiencies were improved by adding a small amount of $SbBr_3$, CsI or RbBr to the perovskite phase, which would be due to the doping effect of Sb, Br and Cs/Rb atom at the Pb, I and $CH_3NH3$ sites, respectively.